Exhaust gas purifying catalyst
US6133185A · kind A · utility
29Cited by
19References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 6, 1996 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Nov 6, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purifying catalyst, for reducing nitrogen oxides and ammonia in an exhaust gas of an internal combustion engine, in an oxidizing atmosphere, is provided. The exhaust gas purifying catalyst comprises a first catalyst having zeolite carrying platinum and copper thereon. Preferably, the exhaust gas purifying catalyst further comprises a second catalyst having zeolite carrying copper thereon. Preferably, the second catalyst is arranged upstream of the first catalyst, with respect to the exhaust gas flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.